Bored and dissatisfied with his life, a triangle visits a local shapeshifter to add another angle to his shape. Poof! He becomes a quadrilateral. But then he gets greedy and keeps adding angles until he's completely transformed. Kids will enjoy this boldly colorful introduction to shapes and basic math concepts.<p>Now available in Scholastic Bookshelf editions, the Brainy Day Books have been developed by nationally acclaimed math educator and best-selling author Marilyn Burns. Using entertaining fictional stories, these books dispel the myth that math is dry, inaccessible, and unimaginative. At the end of each book, there's a special section that further outlines math concepts and provides questions to further engage children.